Cistern.



PATENTED OCT. 16, 1906.

J. S. ATTBNHOPER.

CISTERN.

APPLICATION FILED s1:1 1:.11,19o5.

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UNITED STATES PATENT OFFICE.

CISTERN.

Specification of Letters Patent.

Patented Oct. 16, 1906.

Application filed September 11,1905. Serial No. 277 996.

To all whom it may concern:

Be it known that I, JOHN S. ATTENHOFER, a citizen of the United Statesof America, residing at New Orleans, in the parish of Orleans and Stateof Louisiana, have invented certain new and useful Improvements inCisterns, of which the following is a specification.

This invention relates to cisterns and tanks, and is designed moreparticularly for receiving and storing rain-water.

An object of the invention is to provide novel means to permit the waterwithin the cistern to support a layer of oil, provision being made forpermitting the discharge of the water of the cistern without disturbingthe oil. By this means insects cannot gain ac-` cess to the water of thetank or cistern, and such a cistern would be eliminated as abreeding-place for insects.

A further object of this invention is to provide novel means for causingdisplacement of the sediment at the bottom of the tank where the waterilows to the discharge-pipe, and as a further means for causingdisplacement of the sediment the water is supplied to the tank throughan elbow, by which a circular movement is given the water.

Another object of the invention is to produce a novel device of thiskind wherein the water at the bottom of the tank is the first to bedischarged.

A still further object of this invention is to provide a cistern whereinthe discharge-pipe is protected by a removable cap in order that accessto the jacket containing the discharge pipe may be had, and the capforms a complete siphon when the water reaches the top of the cap.

With the foregoing and other objects in view the invention consists inthe details of construction and in the arrangement and combination ofparts, to be hereinafter more fully set forth and claimed.

ln describing the invention in detail reference will be had to theaccompanying drawings, forming part of this specification, wherein likecharacters denote corresponding parts in both views, in which- Figure 1is a sectional view of the cistern with the discharge-pipe in elevation.Fig. 2 is a sectional view of the discharge-pipe and its jacket.

ln the drawings, A denotes a tank, or it may be the wall or lining of acistern above or dug in the ground, where suflicient elevation isafforded to cause proper running of the water.

B indicates a discharge-pipe which preferably passes through the bottomof the tank and terminates a suitable distance from the top of the tank,it being the purpose of the inventor to have the end of thedischargepipe in such relation to the top of the tank as to cause thewater to find its way out of the discharge-pipe when the water in thetank reaches a predetermined level. The exact proportions and relationmay be varied to suit particular requirements.

A jacket C surrounds that portion of the discharge-pipe within the tankand preferably extends several inches beyond the end of thedischarge-pipe. The jacket is -provided with a removable cap D, whichmay be removed to gain access to the interior of the jacket. This cap Dis of such size as to have its lower edge beneath the level of the topof the discharge-pipe B. This capdoes not rest on the upper end of thejacket, but is held a slight distance therefrom in order that it mayform a Siphon. To hold the cap in its position, any suitable means maybe employed; but it is found advantageous to form with the lower edge ofthe cap arms b, which bear against thejacket C, and these arms may be ofany number.

When the water rising in the jacket C reaches the to of B, a slightoverflow is formed and wil continue as an overiiow until the water hasreached the top of the jacket;

.but as the water within the cistern continues to rise and reachesnearly the top of the jacket C a full stream of water will pour down thepipe B and produce a siphon, and the siphon will continue until thewater reaches a fraction below the cap D, when the siphon will break. Bycreating this siphon any accumulation of sediment that may occur at thebase of the jacket will be drawn up and carried out through the pipe B,which will never occur if the pipe B always remains IOO as an overflow.The jacket C can be removed any time, as it rests loosely on the base ofthe cistern. Lugs e are arranged around the pipe B to center the jacketwith relation to the said pipe B.

At a suitable distance from the bottom of the tank the jacket is flared,as indicated at E, and the iiared portion forms a chamber which is incommunication with the tank and with the A, space surrounding thedischargepipe. The chamber is provided with a series of curvedpartitions F, forming dellectors, which also help to give the water atthe bottom of the cistern the same circular motion imparted to thesurface of the water in the cistern, causing the sediment to work itselfto the center of the cistern and to be caught in the flared pipe orchamber to be discharged. The supply-pipe G preferably enters the tankat or near the top, and it has an elbow H, which causes the water tocirculate around the tank, which movement aids in diverting the sedimentto the chamber.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

l. In a cistern, a suitable receptacle, a dischar e-pipe terminatingnear the top thereof, a jac ret for the discharge-pipe, means within thejacket for imparting a circular movement to the water entering thereinandfa'fsuitable supply-pipe.

2, In a cistern, a suitable receptacle, a discharge-pipe, extendingvertically in the receptacle, a jacket for the discharge-pipe, a flaredbottom on the jacket in communication with the receptacle and partitionsin the flared bottom for causing circulation of the water, and asuitable supplyipe.

3. In a cistern, a receptac e, a dischargepipe terminating near the topthereof, a jacket for the discharge-pipe, and curved partitions withinthe jacket causing circulation of the water, and a suitable supply-pipe.

In testimony whereof I alfiX my signature, in the presence of twowitnesses, this 5th day of September, 1905.

JOHN S. ATTENHOFER.

Witnesses:

ARTHUR J. GALALUT, F. T. DAUNIs.

